CVE-2016-4656
Summary
| CVE | CVE-2016-4656 |
|---|---|
| State | PUBLISHED |
| Assigner | apple |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2016-08-25 21:59:01 UTC |
| Updated | 2026-04-21 16:22:57 UTC |
| Description | The kernel in Apple iOS before 9.3.5 allows attackers to execute arbitrary code in a privileged context or cause a denial of service (memory corruption) via a crafted app. |
Risk And Classification
Primary CVSS: v3.1 7.8 HIGH from [email protected]
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS: 0.667430000 probability, percentile 0.985520000 (date 2026-04-24)
CISA KEV: Listed on 2022-05-24; due 2022-06-14; ransomware use Unknown
Problem Types: CWE-787 | n/a | CWE-787 CWE-787 Out-of-bounds Write
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| 3.1 | ADP | DECLARED | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| 3.1 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | Secondary | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| 2.0 | [email protected] | Primary | 9.3 | AV:N/AC:M/Au:N/C:C/I:C/A:C |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
NoneUser Interaction
RequiredScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v2.0 Breakdown
Access Vector
NetworkAccess Complexity
MediumAuthentication
NoneConfidentiality
CompleteIntegrity
CompleteAvailability
CompleteAV:N/AC:M/Au:N/C:C/I:C/A:C
CISA Known Exploited Vulnerability
| Vendor | Apple |
|---|---|
| Product | iOS |
| Name | Apple iOS Memory Corruption Vulnerability |
| Required Action | Apply updates per vendor instructions. |
| Notes | https://nvd.nist.gov/vuln/detail/CVE-2016-4656 |
NVD Known Affected Configurations (CPE 2.3)
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| Apple iOS CVE-2016-4656 Memory Corruption Vulnerability | af854a3a-2127-422b-91ae-364da2661108 | www.securityfocus.com | Broken Link, Third Party Advisory, VDB Entry |
| About the security content of iOS 9.3.5 - Apple Support | af854a3a-2127-422b-91ae-364da2661108 | support.apple.com | Release Notes, Vendor Advisory |
| WebKit - not_number defineProperties UAF (Metasploit) - iOS remote Exploit | af854a3a-2127-422b-91ae-364da2661108 | www.exploit-db.com | Exploit, Third Party Advisory, VDB Entry |
| APPLE-SA-2016-08-25-1 iOS 9.3.5 | af854a3a-2127-422b-91ae-364da2661108 | lists.apple.com | Mailing List, Vendor Advisory, Broken Link |
| Apple iOS WebKit Flaws Let Remote Users Execute Arbitrary Code and Applications Obtain Kernel Memory Contents and Gain Elevated Privileges - SecurityTracker | af854a3a-2127-422b-91ae-364da2661108 | www.securitytracker.com | Broken Link, Third Party Advisory, VDB Entry |
| www.cisa.gov/known-exploited-vulnerabilities-catalog | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | www.cisa.gov | US Government Resource |
| Sophisticated, persistent mobile attack against high-value targets on iOS | Lookout Blog | af854a3a-2127-422b-91ae-364da2661108 | blog.lookout.com | Broken Link |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
| CISA Known Exploited Vulnerabilities catalog | CISA | www.cisa.gov | kev |
No vendor comments have been submitted for this CVE.
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| ADP | 2022-05-24T00:00:00.000Z | CVE-2016-4656 added to CISA KEV |
There are currently no legacy QID mappings associated with this CVE.